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//===-- Linux implementation of socketpair --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/sys/socket/socketpair.h"
#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
#include "src/__support/common.h"
#include "src/__support/libc_errno.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/sanitizer.h"
#include <linux/net.h> // For SYS_SOCKET socketcall number.
#include <sys/syscall.h> // For syscall numbers.
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(int, socketpair,
(int domain, int type, int protocol, int sv[2])) {
#ifdef SYS_socketpair
int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketpair, domain, type,
protocol, sv);
#elif defined(SYS_socketcall)
unsigned long sockcall_args[3] = {
static_cast<unsigned long>(domain), static_cast<unsigned long>(type),
static_cast<unsigned long>(protocol), static_cast<unsigned long>(sv)};
int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_socketcall, SYS_SOCKETPAIR,
sockcall_args);
#else
#error "socket and socketcall syscalls unavailable for this platform."
#endif
if (ret < 0) {
libc_errno = -ret;
return -1;
}
MSAN_UNPOISON(sv, sizeof(int) * 2);
return ret;
}
} // namespace LIBC_NAMESPACE_DECL
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